Again, this is a similar ammo type effect from Cold War. In Vanguard, quipping Cryofreeze gives you the chance to slow enemies. Brain Rotīrain Rot gives you the chance to turn enemies to your side, similarly to the ammo type that was in Black Ops Cold War Zombies. Resurrectionist will act similar to the old Quick Revive perk, and it allows you to revive allies faster. In Vanguard Zombies, Bloodloust makes melee attacks do more damage, as well as heal you.
To help you chose, here are the Vanguard Zombies covenant abilities: Bloodlust You can also only run three covenants at a time, so picking the right ones for you is crucial. We’ll update this guide with more info once we have it. Each covenant can be upgraded, but some have more upgrade tiers than others.